ASTM D2265-06
(Test Method)Standard Test Method for Dropping Point of Lubricating Grease Over Wide Temperature Range
Standard Test Method for Dropping Point of Lubricating Grease Over Wide Temperature Range
SIGNIFICANCE AND USE
The dropping point is useful to assist in identifying the grease as to type and for establishing and maintaining bench marks for quality control. The results are to be considered to have only limited significance with respect to service performance because dropping point is a static test.
Cooperative testing3 indicates that, in general, dropping points by Test Method D 2265 and Test Method D 566 are in agreement up to 260°C. In cases where results differ, there is no known significance. However, agreement between the manufacturer and purchaser as to test method used is advisable.
SCOPE
1.1 This test method covers the determination of the dropping point of lubricating grease.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
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Standards Content (Sample)
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Designation: D2265 − 06
StandardTest Method for
Dropping Point of Lubricating Grease Over Wide
1
Temperature Range
This standard is issued under the fixed designation D2265; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.1.2 lubricating grease, n—a semi-fluid to solid product of
a thickener in a liquid lubricant.
1.1 This test method covers the determination of the drop-
3.1.2.1 Discussion—Thedispersionofthethickenerformsa
ping point of lubricating grease.
two-phase system and immobilizes the liquid lubricant by
1.2 This standard does not purport to address all of the
surfacetensionandotherphysicalforces.Otheringredientsare
safety concerns, if any, associated with its use. It is the
commonly included to impart special properties. D217
responsibility of the user of this standard to establish appro-
3.1.3 observed dropping point, n—the value noted on the
priate safety and health practices and determine the applica-
thermometer monitoring the internal temperature of the grease
bility of regulatory limitations prior to use.
test cup when the first drop of material falls from the test cup
and reaches the bottom of the test tube.
2. Referenced Documents
2 3.1.4 thickener, n—in lubricating grease, a substance com-
2.1 ASTM Standards:
posed of finely-divided particles dispersed in a liquid to form
D217Test Methods for Cone Penetration of Lubricating
the product’s structure.
Grease
3.1.4.1 Discussion—Thickeners can be fibers (such as vari-
D566TestMethodforDroppingPointofLubricatingGrease
ous metallic soaps) or plates or spheres (such as certain
D3244Practice for Utilization of Test Data to Determine
non-soapthickeners),whichareinsolubleor,atmost,onlyvery
Conformance with Specifications
slightly soluble in the liquid lubricant. The general require-
E1Specification for ASTM Liquid-in-Glass Thermometers
mentsarethatthesolidparticlesbeextremelysmall,uniformly
dispersed, and capable of forming a relatively stable, gel-like
3. Terminology
structure with the liquid lubricant. D217
3.1 Definitions:
3.1.1 dropping point, n—a numerical value assigned to a
4. Summary of Test Method
grease composition representing the corrected temperature at
4.1 A grease sample in a grease test cup is supported in a
which the first drop of material falls from the test cup and
testtubeplacedinanaluminumblockovenatapresetconstant
reaches the bottom of the test tube.
temperature.Asamplethermometerisplacedinthetubeandso
3.1.1.1 Discussion—In the normal and proper operation of
positioned that it measures the temperature in the sample cup
this test method, the observed dropping point is corrected by
without coming in contact with the grease.
adding to it a value representing one third of the difference
4.2 As the temperature increases, at some point a drop of
betweentheovenblocktemperatureandtheobserveddropping
material will fall from the cup to the bottom of the test tube.
point temperature. This corrected value is recorded as the
The reading on the sample thermometer is recorded to the
dropping point of the grease.
nearest degree as the observed dropping point. At the same
time, the temperature of the aluminum block oven is also
recorded to the nearest degree.
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
4.3 One third the difference between the two values is the
D02.G0.03 on Physical Tests.
correction factor which is added to the observed value and
Current edition approved May 1, 2006. Published May 2006. Originally
recorded as the dropping point of the grease.
approved in 1964. Last previous edition approved in 2000 as D2265–00. DOI:
10.1520/D2265-06.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 5. Significance and Use
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1 The dropping point is useful to assist in identifying the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. grease as to type and for establishing and maintaining bench
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D2265 − 06
(a) Dimensions in millimetres.
FIG. 1 Apparatus for Dropping Point Test of Lubricating Grease
marks for quality control. The results are to be considered to 6.1.3 Cup Support, glass tubing as shown in C, Fig. 1.
have only limited sign
...
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